IMECH-IR  > 力学所知识产出(1956-2008)
On the determination of laminar flame speeds from stretched flames
Wu CK(吴承康); Law CK
会议录名称Proceedings of the 20th Symposium (International) on Combustion
1985
页码1941-1949
会议名称The 20th Symposium (International) on Combustion
会议日期1984
会议地点Baltimore
摘要

The effects of stretch on the determination of the laminar flame speed are experimentally studied by using the positively-stretched stagnation flame and negatively-stretched bunsen flame, and by using lean and rich mixtures of methane, propane, butane, and hydrogen with air whose effective Lewis numbers are either greater or less than unity. Results demonstrate that flame speed determination can be influenced by stretch through two factors: (1) Preferential diffusion which tends to increase or decrease the flame temperature and burning rate depending on the effective Lewis number, and (2) Flow divergence which causes the flame speed to assume higher values when evaluated at the upstream boundary of the preheat zone instead of the reaction zone. Recent data on flame speed including the present ones are then examined from the unified viewpoint of flame stretch, leading to satisfactory resolution of the discrepancies between them. The present study also proposes a methodology of determining the laminar flame speeds by using the stagnation flame and linearly extrapolating the data to zero stretch rate.

收录类别EI
语种英语
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文献类型会议论文
条目标识符http://dspace.imech.ac.cn/handle/311007/78038
专题力学所知识产出(1956-2008)
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Wu CK,Law CK. On the determination of laminar flame speeds from stretched flames[C],1985:1941-1949.
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